let b = "\u0061"
console.log(typeof b);
console.log(b);
console.log("-----");
let a = "\u20BB"
console.log(a);
console.log('-----');
let c = '\u{1F680}'
console.log(c);
console.log('\u{1F680}' === '\uD83D\uDE80');

let text = String.fromCodePoint(0x20BB7);//将根据指定的码位序列返回一个字符串的方法
console.log(typeof text);
console.log(text);
console.log('----');
const json = '"\u2028"';
console.log(typeof json);
console.log(JSON.parse(json));
console.log(json);

console.log(JSON.stringify('\u{D834}'));

let hh = $('#result').append(`//前面这个不知道什么意思
  There are <b></b> items
   in your basket, <em></em>
  are on sale!
`);
console.log(hh);
